My dad found me a sewing machine at a yard sale a few days ago. It is a Centennial Dressmaker brand Zigzag Deluxe model that is attached to its own table/hideaway. Sorry I haven't included any pictures of it. I can if needed. It runs but has no original accessories if any. My question is how do I thread the machine because it needs new thread. There is no manual and I can't seem to find anything online to help.

Here are the photos I should have posted months ago. Sorry for the super long delay. I have no excuses. If anyone could help me figure out how to thread this I would greatly appreciate the help.